The LP-E6N battery also communicates with compatible EOS digital cameras, so that you can always check the remaining capacity on the camera's power source info screen. In addition, a unique feature of the LP-E6N battery pack is that it has a microchip encoded with an 8-character serial number. So when the battery pack is installed in the camera, you can register it using a menu command. Then track the condition and power characteristics of up to 6 batteries in your camera to ensure you use your batteries evenly and identify batteries that are near the end of their useful lifespan.